Alexius I (disambiguation)
# Alexius I (disambiguation)

Alexius I or Alexios I Komnenos (1048–1118), was Byzantine Emperor.

Alexius I may also refer to:

* Alexius of Constantinople, Ecumenical Patriarch in 1025–1043
* Alexios I of Trebizond (c. 1182 – 1222), Emperor of Trapezunt
* Alexis of Russia (1629–1676), second Russian tsar of the Romanov dynasty
* Patriarch Alexy I of Moscow (1877–1970), 13th Patriarch of Moscow
